In a dreamlike version of the Old West, Tom Ketchum struggles to clear his name—and stay alive—when he's mistaken for wanton outlaw "Black Jack" Ketchum. With the aid of his talking sidearm, a secretive gambler, and a mute girl with a Winchester, Tom evades the mysterious Union and its supernatural enforcers, the faceless Dusters, as he's forced to question his identity, his sanity, and his very existence.